English operator: Panoramio described at URL: https://web.archive.org/web/20161030111831/http://www.panoramio.com/photo/109282394...
English operator: Panoramio described at URL: https://web.archive.org/web/20161029173445/http://www.panoramio.com/photo/109281651...
English operator: Panoramio described at URL: https://web.archive.org/web/20161102131738/http://www.panoramio.com/photo/109281646...
English operator: Panoramio described at URL: https://web.archive.org/web/20161027195342/http://www.panoramio.com/photo/109281663...
English operator: Panoramio described at URL: https://web.archive.org/web/20161029173515/http://www.panoramio.com/photo/109281652...
English operator: Panoramio described at URL: https://web.archive.org/web/20161027195446/http://www.panoramio.com/photo/109281667 determination method...